Water-treatment device



FIG. 1 is a perspective view of a water-treatment device showing my new design;

FIG. 2 is another perspective view of the water-treatment device;

FIG. 3 is a front view of the water-treatment device;

FIG. 4 is a rear view of the water-treatment device;

FIG. 5 is a left-side view of the water-treatment device;

FIG. 6 is a right-side view of the water-treatment device;

FIG. 7 is a top view of the water-treatment device; and,

FIG. 8 is a bottom view of the water-treatment device.

The broken lines shown in the drawings form no part of the claimed design. 

CLAIM The ornamental design for a water-treatment device, as shown and described. 